#!/bin/bash
#

hour=$(date +%H)

if [ $hour -ge 8 -a $hour -le 12 ]; then
   echo "上午"
elif [ $hour -gt 12 -a $hour -le 14 ]; then
   echo "中午"
elif [ $hour -gt 14 -a $hour -le 18 ]; then
   echo "下午"
else
   echo "晚上"
fi
